The year is 1883, and Easter Pinkerton is one of the most secret agents in the Crown's service. The greatest constant in her life has been her duty to the realm: She knows its secrets, safeguards its interests, and kills its enemies. Pinkerton's world of shadows, lies, and hidden motives is a battlefield where she expects to find few surprises, but her latest investigation has uncovered something beyond a fresh nest of treason. The trade of blood for power is a familiar enough transaction, but not when that power includes raising the dead or death, delivered invisibly at a distance. Pinkerton will have to prepare to fight enemies she could not have imagined, rely upon allies she would never have contemplated, and above all, decide where her duty truly lies. The threat is one that she would have once insisted was imaginary, and so Pinkerton may have to consider an alternative she would have likewise declared to be impossible, and become a traitor herself.